1212755233 has 4 divisors (see below), whose sum is σ = 1212824980. Its totient is φ = 1212685488.

The previous prime is 1212755183. The next prime is 1212755239. The reversal of 1212755233 is 3325572121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3325572121 = 229 ⋅14522149.

It can be written as a sum of positive squares in 2 ways, for example, as 171531409 + 1041223824 = 13097^2 + 32268^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212755233 - 2²¹ = 1210658081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212755195 and 1212755204.

It is not an unprimeable number, because it can be changed into a prime (1212755239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14683 + ... + 51391.

It is an arithmetic number, because the mean of its divisors is an integer number (303206245).

Almost surely, 2^1212755233 is an apocalyptic number.

It is an amenable number.

1212755233 is a deficient number, since it is larger than the sum of its proper divisors (69747).

1212755233 is an equidigital number, since it uses as much as digits as its factorization.

1212755233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69746.

The product of its digits is 12600, while the sum is 31.

The square root of 1212755233 is about 34824.6354324062. The cubic root of 1212755233 is about 1066.4104342324.

The spelling of 1212755233 in words is "one billion, two hundred twelve million, seven hundred fifty-five thousand, two hundred thirty-three".